/Engine/Plugins/Animation/DeformerGraph/Source/OptimusCore/Public/OptimusDeformer.h
Takes an existing graph and adds it to this graph collection. If the graph cannot be added, the object remains unchanged and this function returns false.
true if the graph was successfully added to the graph.
virtual bool AddGraph ( [UOptimusNodeGraph](API\Plugins\OptimusCore\UOptimusNodeGraph) * InGraph, int32 InInsertBefore )